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J. JACOBS.

APPARATUS FOR SHAPING AND HOLDING METAL WHILE BEING TBMPERED. No. 256,898. Patented Apr. 25, 1882.

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UNITE STATES ATENT amen...

JOHN JACOBS, OF SANDUSKY, OHIO, ASSIGNOR OF ONE-HALF TO HENRY JACOBS, OF SAME PLACE.

APPARATUS FOR SHAPING AND HOLDING METAL WHILE BEiNG TEMPERED.

SPECIFICATION forming part of Letters Patent No. 256,898, dated April 25, 1882.

Application filed December 29,1881.

To all whom it may concern:

Be it known that I, JOHN JACOBS, of Sandusky, county of Erie, State of Ohio, have invented a new and useful Improvement in Apparatus for Shaping Metal and Holding it while being Tempered; and I declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use it, reference beinghad to the accompany ing drawings, which form a part of this specification.

My invention consists of the combinations of devices and appliances hereinafter described, and more particularly pointed outin the claims.

It is the object of my invention to produce a device forshapin g metallic plates or bladessuch as hoeblades, &c.--while they are hot, and for holding them in their properly-shaped condition while they are undergoing the process of tempering or hardening in oil or other or press-plates, having their inner surfaces grooved, serrated, or nodulated, thereby forming a series of outstanding lands, a, constituting their opposing surfaces, so arranged that when the parts are clamped together the lands upon one jaw preferably come opposite the recesses or grooves on the other jaw and allow the free passage of the oil or other tempering-liquid over the surface, both upper and under, of the blade or plate that is being shaped and tempered.

B B are side straps for holding the partsin position, and having slots 1), which allow a free movement of the clamp A.

G is an eccentric clamping-lever for exerting pressure upon the jaws by means of the shaft D.

E E are gagescrews to regulate the adj ustment of the jaws to plates or blades of varying thickness. The jawA is secured firmly to the side straps by the bolts F on each side,

(No model.)

and the jaw A movably secured by the bolts F passing through the slots 0.

G G are ordinary coil-springs, which act to open the jaws of the press when the lever C is released.

The operation of the device will now be understood. The blade or plate to be tempered, X, is heated to the required temperature, then clamped between the jaws, which impart the desired shape to it. The apparatus, with the plate between its jaws, is then plunged into a vat of oil or other liquid used for tempering, and the ridges or nodules on the jaws, as aforesaid, are in such order that the oil is allowed to come in contact with the parts ofthe blade to be tempered. In practicel prefer to make these 'raised portions in the form of squares, though the form is not essential to the invention 5 and I also prefer to make them about one-quarter of an inch wide, and also raised about one-quarter of an inch above the surface of the jaw; but circumstances may vary these conditions.

The device is fixed upon an iron or other metallic frame provided with a hinge orjointof the usual construction, so arranged as to render the operation of dipping itinto the vat of oil or other liquid an easy one.

I would have it understood that I do not limit myself to a device for simply straightening or flattening steel or other metal, for it is apparent that the jaws or clamps could be curved or dished, and thus give this latter shape or any other desired shape to the metal plate or blade.

I am aware that it is not new to construct 8 a metal-shaping apparatus with dies for permitting access of a liquid to both sides of aheated plate under pressure between said dies, and I do not claim such an apparatus, broadly.

What I claim is-- 1. The combination, with the adjustable stationary modulated die A, of the movable nodulated upper die, A, the eccentric roller D, provided with a handle and arran d to force 5 said upper die toward the lower die, and the springs arranged to retract said upper die, substantially as described.

2. The combination of the upper end lower ating the same, and the springs G G for re- [0 nodulated dies, the strapsor standards B B, traeting said upper die, substantially as de provided with the slots 1) and inwardly-pro scribed. jeeting lower ends, the bolts F, securing the In testimony whereof I sign this specifica- 5 lower die, the screws E E for supporting and tion in the presence of two Witnesses.

adj usting the same, the bolts F, moving loosely JOHN JACOBS. in the upper slots and secured to the upper \Vitnesses: die, the eccentric roller 1), bearing upon the ARTHUR PHINNEY, upper die and provided with means for oper- F. A. POMEROY. 

